I would suggest that anyone who thinks the US should back away--or, more precisely, back down--in order to avoid a conflict here, is aghast at war with Russia.
Does that make sense to you?
Well, not me.
And not anyone I have ever known of, either.
I certainly do not think that the US should instigate a war with Russia.
If Russia should begin such a war--and I consider that possibility rather remote--then the US should respond accordingly.